To evaluate the efficacy and tolerability of a vaginal pessary containing 750 mg of metronidazole and 200 mg of miconazole nitrate used daily for 7 days in the treatment of vaginitis. Ninety‐two women with vaginitis participated in this phase 3 study using one vaginal pessary daily for 7 days. Gynecological and microbiological evaluations were carried out prior to and following treatment. Reductions occurred in symptoms and signs of vaginitis. Clinical cure rate was 87.7%, while the cure rates according to microscopy and Candida albicans culture were 81.8% and 73.9%, respectively. The cure rate for bacterial vaginosis was 75% and culture of Gardnerella vaginalis turned negative in 63.6% of cases following treatment. The medication was well tolerated. Use of a combination of 750 mg of metronidazole and 200 mg of miconazole in a single daily application was found to be effective in the treatment of the most common causes of vaginitis Ver menos